Is 3 weeks enough for TC and BPT?

I sit both BPT and TC on the 10th of December which is in 3 weeks. I had two mocks last week in which I scored 37.5% and 28% having only revised IHT over both papers so I was pleasantly surprised. Other than that I have done no practise questions. My plan is to spend the next three weeks solely on practise questions and revising the content that way. Do you think that is enough time to passed both exams and roughly how many questions do you reckon I need to get through. If anyone has any tips they found useful for revising/to help them pass it would be greatly appreciated.